The definition of a transition metal is that it must have an incompleted sub-level in one or more of its oxidation states. As zinc has a completed sub-level at all oxidative states, so it can't be considered a transition metal.
4. How many molecules are in the following formula?
3Fe2O3
Answer:
Option C, 3 molecule is correct
Explanation:
The formula is of Ferric oxide
3Fe2O3
The number 3 ahead the chemical formula represents the number of molecules of the given substance. In general the formula of iron (III) oxide is Fe2O3
Since there are three molecules of it hence the formula is written as 3Fe2O3
Option C, 3 molecule is correct
Which scatterplot shows a positive association between the variables
Answer:
there is no picture, but it will be a graph that shows a mostly straight line going up to the right
Explanation:
An element is reduced while another element is oxidized. What is this? 1. Acid-base 2. Redox 3. Precipitation 4. Combustion
Answer:
2. Redox
Explanation:
A redox reaction is that in which an element is reduced while another element is oxidized. For example, let's consider the following redox reaction.
Fe + S ⇒ FeS
Fe is oxidized because it loses electrons to form Fe²⁺, while its oxidation number increases from 0 to 2+.
S is reduced because it gains electrons to form S²⁻, while its oxidation number decreases from 0 to 2-.
calculate the number of mole in 11.2l,at stp of oxygen
Answer:
[tex]\boxed {\boxed {\sf 0.5 \ moles}}[/tex]
Explanation:
At standard temperature and pressure (STP), 1 mole of any gas has a volume of 22.4 liters. This applies to oxygen, so let's create a proportion.
[tex]\frac {1 \ mol}{22.4 \ L}[/tex]
Since we are trying to find the moles in 11.2 liters, we should multiply by that number.
[tex]11.2 \ L *\frac {1 \ mol}{22.4 \ L}\\[/tex]
The units of liters cancel.
[tex]11.2 *\frac {1 \ mol}{22.4 }[/tex]
Condense into 1 fraction.
[tex]\frac {11.2 }{22.4 } \ mol[/tex]
[tex]0.5 \ mol[/tex]
At STP, 11.2 liters of oxygen gas is equal to 0.5 moles of oxygen gas.
which of the following decreases with increasing atomic number in group 2
Answer: Ionization energy
Explanation:
Your welcome
Match the atoms to their correct electron configuration.
(Answer choices in photo)
Answer:
The answer to your questions are given below
Explanation:
The answer to the questions given above can simply be obtained by writing the electronic configuration of each atom.
The electronic configuration of each atoms can be written as follow:
Fluorine, F (9) => 1s² 2s²2p⁵
Sodium, Na (11) => [Ne] 3s¹
Helium, He (2) => 1s²
Calcium, Ca (20) => [Ar] s²
Nitrogen, N (7) => 1s² 2s²2p³
Sulphur, S (16) => [Ne] 3s²3p⁴
What type of bond will form between nitrogen and bromine?
Answer:
Non-polar covalent bond
Explanation:
The bond between two nonmetal atoms is always covalent.
hope my answer helps you
To write a number in scientific notation:
a.)move the decimal place until there is a number between one and ten
b.) Write x 10 to the right of the number
C.)count the number of times the decimal had to move and write this as an exponent
D) if it was a BIG number, it should be positive if it was a small number (less than 1) it should be negative
3.00 x 108 m/s should be written in scientific notation. Medical Notation (numbers less than 1.0) Add a decimal place after the decimal, to the right. To the left of the decimal point, there should only be one number. The brand-new number ranges from 1.0000 to 9.9999.
How to write a number in scientific notation?For the purpose of providing an exact result, certain elements of scientific notation must be included. In scientific notation, all numbers have the format "m x 10n. Important components for determining the scientific notation include the following:
Decimal: You move the decimal a specific number of times to the right or left of the coefficient to discover the scientific notation until it becomes a number equal to or greater than one and less than 10.
Coefficient: To calculate this value, the decimal point must move a predetermined amount of times. An amount that is one or larger and less than ten is referred to as a coefficient.
Base: The base number is always 10. The exponent comes into play when multiplying to arrive at the final solution.
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Will give BRAINIEST and EXTRA POINTS for correct answer.
someone please help!!
2 C4H10 + 13 O2 --> 8 CO2 + 10 H2O
Starting with 83.42 grams of Oxygen gas in excess C4H10, how much Carbon Dioxide can be created?
Box 1 = number
Box 2 = units
Box 3 = substance
Answer:
BOX 2
Explanation:
Sep Obtain Information What are the Limitations to Making Progress with Engineering Better Batteries ? What progress have Battery Engineers Made?
Limitations in making progress with Engineering Better Batteries is that electric vehicles are being prevented to make progress in terms of size and range , progress which is made is solid state batteries.
What are solid state batteries?
A solid-state battery is a battery technology that uses solid electrodes and a solid electrolyte, instead of the liquid or polymer gel electrolytes which are found in lithium-ion or lithium polymer batteries.
While solid electrolytes were first discovered in the 19th century, several drawbacks have prevented it's widespread application. Developments in the late 20th and early 21st century have caused renewed interest in solid-state battery technologies, especially in the context of electric vehicles, starting in the 2010s.
Solid-state batteries can provide potential solutions for many problems of liquid Li-ion batteries, such as flammability, limited voltage, unstable solid-electrolyte interphase formation, poor cycling performance and strength.
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why is FCN linear and not bent
Answer:
The key difference between linear and bent molecules is that linear molecules have atoms bonded to each other, forming a straight molecule, whereas bent molecules have atoms arranged in a bend-shape with an angle. The terms linear molecules and bent molecules describe the shapes of different molecules.
Explanation:
bcz of molecules ............
A standard galvanic cell is constructed in which a Ni2+ | Ni half cell acts as the cathode. Which of the following statements are correct? (choose all that apply)
1. As the cell runs, anions will migrate from the Ni2+|Ni compartment to the other compartment.
2. The anode reaction could be Cr -> Cr3+ + 3e-
3. Ni2+ is reduced at the cathode.
4. The anode compartment could be I2|I-.
5. Ni is oxidized at the cathode.
Answer:
Ni2+ is reduced at the cathode.
The anode reaction could be Cr -> Cr3+ + 3e-
As the cell runs, anions will migrate from the Ni2+|Ni compartment to the other compartment.
Explanation:
As we know, in a galvanic cell, oxidation occurs at the anode and reduction occurs at the cathode. Hence at the cathode, nickel is reduced as follows;
Ni^2+(aq) + 2e ----> Ni(s)
Considering the reduction potential of the Ni2+ | Ni half cell (-0.25 V) and that of the Cr3+/Cr half cell (-0.74 V), the later has a more negative reduction potential and will most likely serve as the anode of the galvanic cell.
Lastly, the reduction of Ni^2+ leads to a build up of anions in the cathode compartment. To maintain neutrality in the cell, some anions migrate to the other compartment.
write down any two causes of water pollution
Explanation:
hope it is helpful to you
Which of these is an example of a physical property?
A. Potassium ignites when placed in water.
B. Iron melts at 1,535 °C.
C. Hydrogen combines with oxygen to form water.
D. Chlorine oxidizes bacterial cells.
Answer: B is correct.
Explanation:
Answer A is a chemical change because of intense changes of color and expansion.
Answer C is a chemical change, as hydrogen and water are chemically bonding together.
Answer D is a chemical change because oxidation involves loss of electrons during a chemical reaction.
On the other hand, melting is a physical change. Therefore, answer B is the correct answer.
Consider an electrochemical decomposition apparatus comprised of a strontium chloride cell, a berylium chloride cell, and a barium chloride cell (you should be able deduce the formulae for these compounds). If sufficient charge is passed through the circuit to produce 20 g of strontium in the molten strontium chloride cell, what quantity of berylium is expected in the berylium chloride cell
Answer:
Explanation:
Atomic weight of strontium ( Sr ) is 88 .
Atomic weight of Beryllium ( Be) is 9 .
Both are bivalent .
2 x 96500 coulomb is required to decompose 88 g of Sr .
88 g of Sr requires 2 x 96500 coulomb of charge
20 g of Sr will require 2 x 96500 x 20 / 88 coulomb of charge
coulomb of charge required = 43863.63 coulomb .
9 g of Be requires 2 x 96500 coulomb of charge
2 x 96500 coulomb of charge gives 9 g of Be
43863.63 coulomb .of charge gives 9 x 43863.63 / (2 x 96500 ) g of Be
= 2.04 g.
PLEASE HELP!!
Please
Using ethylene (HC-CHz) as your only source of carbon atoms, outline a synthesis for 3- hexanone,
The organic compound 3-hexanone can be prepared from ethylene using the second method given in the options.
What is 3-hexanone?3-hexanone is an organic compound classified to the ketones. Ketones are compounds with C=O group. 3-hexnone has the carbonyl group in the third carbon in the chain.
3- hexanone can be synthesized alkene sources by first converting them to alkynes. This process is oxidation. Ethylene can be oxidized to ethyne by treating with HBr and NaNH2 followed by hydrolysis.
The obtained higher alkyne or hexyne undergone acid hydrolysis in presence of sulphuric acid giving 3-hexanone.
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Which statement is true about the potential energy diagram for an endothermic reaction? (5 points)
The potential energy of the products is equal to the potential energy of the reactants.
It starts at a higher energy value and ends at a lower energy value.
The energy value remains the same throughout the diagram.
Products have more potential energy than reactants.
Answer:
Products have more potential energy than reactants.
As shown in the image.
What is the domain of the following function?
A) x < 15
B) x ≤ 4
C) x > 2
D) All Real Numbers
The domain of the function that has been shown are all real numbers. Option D
What is the domain of a function?Let us note that when we are talking about the domain of the function, we mean the areas that the function is able to have a value. We are also trying to define the areas where the actual value of the function can be determined.
It is normal that all the mathematical functions that we have must have a domain and a range. The domain of the function would depend on the kind of function that it is and that determines what its domain would be.
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A closed tank contains pure nitrogen gas at a pressure of 855
mmHg and a temperature of 26.3 °C. What would the pressure be
if the tank were heated to 1253 °C? (pay attention to units)
Answer:
If the tank were heated to 1253ºC, the pressure of the tank would be 40,734.41 mmHg.
Explanation:
Given that a closed tank contains pure nitrogen gas at a pressure of 855 mmHg and a temperature of 26.3ºC, to determine what the pressure would be if the tank were heated to 1253 ° C the following calculation must be performed:
26.3 = 855
1.253 = X
(1,253 x 855) / 26.3 = X
1,071,315 / 26.3 = X
40,734.41 = X
Therefore, if the tank were heated to 1253ºC, the pressure of the tank would be 40,734.41 mmHg.
What mass of ammonium sulfate contains 4.43 x 1024 oxygen atoms?
Answer:
The mass of ammonium sulfate would be 8.86 x 1024 grams.
Explanation:
Ammonium sulfate is composed of four atoms of oxygen (O) and two atoms of nitrogen (N). Therefore, 4.43 x 1024 oxygen atoms would require 8.86 x 1024 grams of ammonium sulfate.
Ammonium sulfate is an inorganic compound composed of two nitrogen atoms (N) and four oxygen atoms (O). The molecular formula for ammonium sulfate is (NH4)2SO4.
This means that for every two nitrogen atoms, there are four oxygen atoms. Therefore, for 4.43 x 1024 oxygen atoms, there would be 8.86 x 1024 grams of ammonium sulfate required.
Who would require more Calories to maintain their weight, and why? Person A: 6
feet tall, 190 lbs, exercises for 30 minutes every day. Person B: 5 feet 6 inches tall,
150 lbs, exercises 10 minutes every day. *
A 81 gram solution of silver nitrate contains
16 grams of AgNO3. What is the percent by
mass of silver nitrate in this solution?
Answer in units of %.
Answer:
19.75 %
Explanation:
The percent by mass of silver nitrate in the solution can be calculated using the following formula:
% AgNO₃ = Mass of AgNO₃ / Mass of solution * 100%As all the required data is already given by the problem, we can now proceed to calculate the percent by mass:
% AgNO₃ = 16 g / 81 g * 100 %% AgNO₃ = 19.75 %How many moles of a gas sample are in a 5.0 L container at 373 K and 203 kPa?
0.33 mole
0.66 mole
1.11 moles
3.05 moles
Answer:
0.33 moles.
Explanation:
Assuming the gas is ideal, we can solve this problem by using the following formula:
PV = nRTWhere:
P = 203 kPaV = 5.0 Ln = ?R = 8.314 kPa·L·mol⁻¹·K⁻¹T = 373 KWe input the data:
203 kPa * 5.0 L = n * 8.314 kPa·L·mol⁻¹·K⁻¹ * 373 Kn = 0.327 molThe answer is thus the first option, 0.33 moles.
Answer:
0.33 mole
Explanation:
what is a difference between mass and volume
Answer:
Volume is how much space the object is taking up, whereas mass is the measurement of the amount of matter in the object.
Explanation:
given the following hypothetical reaction 2E(g)+ F(g)+O(g)_products.if the rate law is rate _K(e)^2(f)^-1,what is the order of the reaction with respect to water?
Answer:
See explanation.
Explanation:
Hello there!
In this case, considering the given information, it is not possible to figure out such order of reaction with respect to water as it is not involved in the given chemical reaction:
2E(g)+ F(g)+O(g)_
However, we can say that the order of reaction is 2 with respect to E (power of 2 in the rate law), 1 with respect to F (power of 1 in the rate law) and 0 with respect to O (power of 0 or not present in the rate law).
Regards!
How many oxygen atoms are in 1.00 kg of carbon dioxide?
Answer: I believe its two
Explanation:
Balancing chemical reactions, what is it and two examples!!
PLEASE HELP I NEED THE ANSWER!!!
Giving lots of POINTS
Answer:
A balanced chemical reaction is an equation where the number of atoms of each type in the response is the same on both reactants and product sides.
Explanation: Burning, and cooking are two examples. :)
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Brainliest get's +20 points!
Answer:
i think thats correcr!
Explanation: